PPSCFPSCNTSPakistan govt jobs
- Subject
- Thermodynamicsmechanical-engineering-mcqs › thermodynamics
- Published
- 26 Jan 2019
- Last updated
- 28 May 2026
Explanation
For a process to be reversible, there must be no temperature gradient between the hot source and the working substance, meaning the temperature difference should be zero. Any finite difference leads to irreversibility.
More Thermodynamics MCQs
Practice related questions from the same subject.
- 1.Which variable governs the physical characteristics of an ideal gas?
- 2.What is the standard unit of time according to the International System of Units (SI)?
- 3.Which of the following principles apply to the behavior of an ideal gas?
- 4.What is the standard unit of temperature in the International System of Units (SI)?
- 5.What is the standard unit of length in the International System of Units (SI)?
- 6.According to Gay-Lussac's law for an ideal gas, the absolute pressure of a fixed amount of gas is directly proportional to which of the following?
- 7.Which of the following represents the general gas equation?
- 8.Which of the following substances can be considered gases under typical temperature conditions, allowing gas laws to be applied?
More in Mechanical Engineering Mcqs
- Compressors, Gas Turbines and Jet Engines
- Engineering Materials
- Engineering Mechanics
- Fluid Mechanics
- Heat Transfer
- Hydraulic Machines
- I.C. Engines
- Machine Design
- Nuclear Power Plants
- Production Technology
- Refrigeration and Air Conditioning
- Steam Boilers, Engines, Nozzles and Turbines
- Strength of Materials
- Theory of Machines
- Workshop Technology